Abstract:The Si3N4/SiC and Si3N4/SiC/TiO2 composite ceramics were sintered at 1850 °C, for 2 h, in
air by Hot-Press. A semi-elliptical surface crack was made at the center of the tensile surface of the
test specimen using a Vickers indenter at a load of 24.5 N. By this method, the crack length on surface
was made the semi-elliptical cracks of about 100 ㎛. Crack-healing behavior depends on healing
temperature. The optimum healing condition of Si3N4/SiC and Si3N4/SiC/TiO2 composite ceramics
are well known for 1,300 °C, 1… Show more
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